Engine mounting



\ June 16, 1936. B. A. swENNEs ET Al. l 2,044,649

ENGINE MOUNTING Filed Jan. 21, 195s l 4 sheets-Sheet 1 @i maw 09@ June16, 19.36. B.'A. s'wENNEs E'r AL 2,044,649l

` ENGINE MOUNTING Filed Jan. 21, 1933 4 sheets-shut 2' June 16, 1936--`B'. A. SWENNES ET ALV I 2,044,649

ENGINEL MOUNTING Filed Jan. 21, 1935 4 sheets-sheet s @7715 I lne/@WSWZ5 @im 6lmwmY/ww June `1.6, 1936. B. A. swENNEs ETAL ENGINE MOUNTINGFiled Jan. 2l, 1953 4Sheets-She-et 4 A will, '1111 M f Il flfatentedJune tsm-:e A s1-miesl PA'ri-:NroI-FICE 2,044,649 ENGINE Momma BenjaminA. Swenncs, Rockford, Ill., and Rolland S. Trott, Denver, Colo.; saidSwennes assilnorA Application' January 2l, 1 933, No. 652,894

Q rsomma (ci. 24a-1) i0 tremor or vibration to the frame `or supportupon which the power plant is mounted.

A further object is to provide a` mounting unit composed ofl a coiledspring whi'cliat all times will be under compression, combined with arubl ber member which normally after being installed is undercompressionbut whichA on a rebound or with over-capacity lspringsorbefore the unit isl installed will be in tension,`

il furtherobject-is' to provide a method orsonoI struction' by. wh ic hthesame'compound mounting unitvwhieh will takeboth load Kand'torfiiieand which may be used to mount both` the iront and rear portionsoi the`power plant, and may also if desired be employed as a torque connectionorconnections whose main dutyit is to transmit torquewhetherlaportionioi the'welght oi. the power plant is cris notSupported.

Anefthis is described below and in the. drawings, in which:-

FiguresLl to show diiierent steps in .the icon-'I struction andinstallation of one iorm'oi our mounting -unit, ,which unit willhereinaterbo called a TremoRid,--a name coined for which getsridoitremor..`

Figure .'1` illustrates a plan yview of mountedupon TremoRids at -aplurality of points, all oi which, or-any .two or. more'otwhioh maybeemployed, as wiIlbe-niore fully taken up herein atten-ff w Flgure apartial front view-oi the plant-showndn Figure 7. f y i 1 Figure 9 is-.a.partial section on the linef-b oi Figure "7; looking in` the direction.of the arrows. Figure 101is a modified form ofthe constructionillustrated in Figure 1,.

Figure 11 isa partial section onfthe line 4Ii i 1i of Figure "7,lookingv in the directionr of the arrows and showing anv additional-rfubber mounting Figure 12 is a. modiiiedform 'oithe construe?uonsliown in Figure "11; t

Figure 13 is a partial section on the line ld-SB of Figure?, lookinginthe direction 'of the arrows.

Figure 14 is a secti0na1'-vview oan installed mem.

unit

Tremoltid showing a 'modified means of holding the end plates in place.

Figure 15 is a fragmentary plan view of one of the end plates shown inFigure 14..

Figure 16 shows another form oi 'IremoRid 5 construction.` i x Figure 17is e. fragmentary view oi another form of TremoRid construction.

Figure- 18 showsanother form oi. TremoRid construction provided withsafety rebound hooks. l0 Flgurelil shows another iorm of TremoRidconstruction." 7 Figure 20 shows another form oi TremoRid constructionprovidedwith a .cable as safety rebound Figure 21 shows another form oiTremoRid construction.-

Figure `22 is a top view looking down on Figure 2l.

Figure 23 shows another form of 'rrememd een- 2o struction `providedwith a safety rebound means. Figurev 24 `.shows another iorm of TremoRidconstruction provided with another form of safe- -ty rebound means.

'Figure ,25 shows anothe construction provided .with-another forni oisafety rebound means.

Figures A26 and 27 show modied forms of cups. Figure 28 shows amodiflediorm of adapting the "TremoRid unitM to a powerplani'. mounting.30'

In Figures'l to`6 the cups i are provided with the bolts 2, which may bespot-welded or otherwise. 'pr`evuted from turning with respectto the'oups as by the rubberbonding mentioned below j or in any other propermanner. The bolts 2 are 35 provided with the shoulders 3` and thethreaded.

Figure i shows the assembled bolts and' cups in their future relativepositions.

The rubber member E is next vulcanized, bonded, cemented or otherwiseproperly attached to 40 :torni2 a unit` with the two cups, asshownv inFigure Next, the bottomplate E is assembled with .the

. ylower cup i'and bolt 2 by riveting the shoulder 3 of the bolt 2in'the beveled Acoui'rter bore iof 5 the end plete s. 'This is shown inFigure 3.v The uppenbolt shown in Figure 3 isaI modied form having theange @which is provided with two flat places Q which will be more fullyexplained o hereim'iiter.`v y In Figure 4 it will be seen that thespring it,

whichis here shown unloaded, fits snugly over the cups i and rubbermember ii andvrests upon the lower end-plate o. 55

forced downward, compressing the spring Il so that the shoulder 3 of theupper bolt 2 may beriveted into the bevel counter bore 1 in the upperplate 6. Figure 5 therefore shows the com- -p1eted TremoRid ready forinstallation. The rubber 5 is in tension since it alone is now resistingthe extension of the spring I0 which is in compression.

Figure 6 shows the completed TremoRid of Figure 5 when it is installedbetween the part II of the power plant and part I2 of the frame with thenuts I3 and lock washers I4 properly in place. When thus installed, theweight of the engine rests upon the TremoRid and as we prefer it therate of deilection and construction of the spring III is so proportionedto the load as lto put normally about thirty-pounds to the square inchupon the rubber member 5. It will be seen, however, that if the springII) is too strong or too long the rubber member 5 will carry a reversedload; that is, it will be in tension. Ordinarily, we do not prefer thisconstruction as it means, other things being equal, the spring will notbe as soft in action, and where smoothness of performance is desired wehave found that the softer the spring action is, the better; providedthe load on the rubber does not come to much more than thirty pounds tothe square inch. However,

where a TremoRid is used for a torque connection, a reversed load on therubber in some cases is permissible depending upon conditions includtheframe I6 by TremoRids carried by the cross members I1, I8, I9, 29 and2|. Ordinarily a power plant will be mounted upon the cross member I'Iand the cross member 2l, for instance, but

A the supports on the cross members I8, I9 and 20 may be used in placeof or in addition to the support upon the cross member 2l. The use'ofall the supports shown in Figure 'l would probably occur only under veryspecial sets of conditions or for very special designs', weights, powersand distributions of weight in a -power plant. For ordinarymotor vehicleconstruction we prefer to support the power plant upon the cross `memberI1, substantially as shown, and upon the cross member 2l, which, withthe cross member I0 and the cross member 2|, is shown broken away forthe sake of clearness and to avoid confusion in the drawing. The exactlongitudinal position of the cross member Il is to be determined tor anypower plant by supporting the power plant as vshown at the front upon ascale and moving the pacity and construction. However, due to vari` ousconsiderations it may be found `impossible to locate the rear mountingat the point of equal weight with the front mounting and under suchconditions identical weight quantities tor each TremoRid can be arrivedat by variation of the angular positioning oi' the TremoRids. Ordinarilyby this method four TremoRids, which will be interchangeable. will besuillcient to mount the entire power plant both front and 5 rear. Underthis plan, if it is necessary for weight or other considerations to usemore than four TremoRids,I additional TremoRids may be empoyed by usingthree or more at the front and three or more at the rear mounting,instead of using additional cross members and TremoRids as shown inFigure 7.

' Figure 8 shows a fragmentary front view of the construction shown inFigure 7 with the axes of the TremoRids intersecting at the desiredposition for the front end of the axis of oscillation of the powerplant. This point of intersection may of course be changed by changingthe verticalposition of the TremoRids, or by changing the angle of theiraxes or by both changing the 20 vertical position and the angle of theiraxes. The particular position ofthe intersection of the axes shown inFigure 8 is in the vertical plane through the axis of the crank shaftbut this of coursewillv vary with the requirements for balance in 25 anyparticular power plant.

Figure 9 shows the mounting of the TremoRids on theA cross member I8`and in contact with the flywheel housing 22 with the TremoRid axesintersecting at the axis of oscillation of the power plant which in thisinstance is illustrated as being only slightly above the axis of thecrank. shaft. This point oi.' intersection may be changed by variationof the same factors mentionedre'- garding the construction shown inFigure 8. 'I'he 'h construction shown in Figure 9 may either beproportioned so that the TremoRids carry someof the weight orproportioned so that the Tremo- Rids are normally unloaded and lonly actto oppose-the torque cushioning oscillation ofthe power plant.

The construction shown in Figure l0 is a variation oi.' that shown inFigure 9 in which the axes of the TremoRids are vertical. In thisconstruction also the TremoRids may either carry some of the weight oract solely to resiliently oppose the torque cushioning oscillation lofthe power plant. In the construction shown in Figure 9 and Figure 10 theTremoRid mounting may, if desired, be so designed as to put a negativeload upon the TremoRids: that is, tension in the rubber member l willtend to pull down upon the power plant.

Figure l-l shows the construction for mount ing the rear of the powerplant upon the cross member 20. The mounting the rear oi.' the powerplant upon the cross member I0 is substantially the same as showninFigure ll. The axes of the TremoRids intersect at the axis oioscillation of the power plant in both cases and the TremoRids contactthe transmission 23. Ordinarily the TremoRids on both the cross memberI. -and the cross member 2l will support weight, but if for any reasonit is necessary or advisable, they may of course carry negative 6"loads. Between the transmission 23 and the cross member 2l a resilientmeans may be provided to 'absorb the fore and ai't movement of the powerplant. 'I'he bracket 10 is bolted or otherwise properly attachedto thetransmission 23; the bracket 'II is bolted. riveted or otherwiseproperly fastened to the cross member 20, and these two brackets serveto,l position the rubber cushion block 'I2 by means of flanges assnowman mund the block, or dmerent positions may be provided by anges ontwo sides of the block, ilanges through the center ofthe block or bybonding the rubber block to members 10 and 1l or by any other propermeans by which the power plant will be resiliently held 'againstlongitudinal movement.

It will be seen from the above description and from lFigure 11 that themeans for locating the power plant with respect to its fore and attpositions may be applied to Figures 9, 10, 12, 13, or used in connectionwith the front mounting on-cross member I1 of Figures 7 and 8 or in anyother application of this TremoRid type construction wh'erebyfull'advantage may be taken of the required universal movement of theTremoRid without the power plant being permitted to move longitudinally.

Figure 12 shows a variation of the construction shown in Figure '11, inwhich the axes o! the TremoRids are vertical, and in which the TremoRidsmay or may not carry a load or may even have a negative load.`

Figure 13 shows a construction for support ing the rear ofthe powerplant upon the cross member 2l, the TremoRids contacting vthefreewheeling housing 24. A variation oi' this Figure 13 constructionwould be substantially the same as the-construction shown in Figure 12.That is, the TremoRids in Figure 13 may, if desired, be positionedwiththeir axes vertical and may be put under either a positive, aneutral or a negative load.

It will be understood from. all the above that though vthese variationsin numbers and ylocations of mountings and TremoRids are permissible tomeet special conditions or to conform to the taste or judgment oidesigners, the construction for the front is substantially as shown inFigure B regardless of whether Tremo- Rids are or are not used for therear mounting.

And if TremoRids are used for the rear mounting we consider it desirablethat the rear mounting be so located 'longitudinally or the Tremo- Ridsof the rear'mounting so positioned in their angularity that allTremoRids carry the same axial load and whatever the rearV mounting`variations may be the same size and vcapacity of TremoRids may be usedall around, and rear constructions substantially like that shown in rearTremoRidson thecross member i9 where the weight sustained will begreater thanv that sustainedby the iront mounting. In any case we preferthat the rear mounting be so located whether on the cross member i9, 20or 2| that -the results and perfomance desired for the rear mountingwill b e provided whenthe same size and capacity oi' TremoRid is at therear.

mounting as at the front.

In'- the construction shown in- Figure 14 thel bolt 2' is provided withthe .iiange having the iiat spots 9 to permit the angeto pass throughthe ilat-sided hole 25 of the end-plate 8'. which is shown also inFigure 15. A' Ii' desired, the bolts 2 in Figure 5fmay. also' have datplaces .to tit atsidedholes in the end plates! .to prevent the end.plate from twisting with respect to lthe bolts.

and this irregular shaped bolt may be riveted the same as the roundbolts shown in Figure 5. In fact, the enlarged portion oi the bolts 2which provide the shoulders 3 may be hexagonal or any other desiredshape to t a similarly shaped hole in the end plates and'prevent turningoi.' the bolts in the end plates. while the riveting prevents separationof the cups I and the end plates 6. After the angeA 8 has passed throughthe plate 6' in the Figure 14 construction, the plate 6' is turned sothat the fiat spots 9 oi' the ilange 8 no longer align4 with the atsides of.

the hole 25, and the end plate B' is thereby locked in place.

ber member 5 if desired.-

Figure 16 shows an inverted TremoRid coristruction in which the rubbermember 26 sur- By this construction the TremoRid may be disassembled forreplacement o! the rubrounds the spring 21. The cups 26 and 29 are vproperly bonded to the rubber 26, and the bolt f 30 is riveted in abeveled counter sink 3i of the cup 29.' The cup 32 is also bonded to therubber member 26 and when the TremoRld is assembled the spring 21 isplaced in the cup 28 and Figure 17 shows a modified form oftheconstruction shown in Figure 16 in which the cups 28 and 29 are bondedto the rubber member 26' and the bolt 34 is welded or otherwise proper lly secured to the cup 29.

Figure 18' shows a construction similarto Figure 5 except for'theaddition of theL safety hooks 36 which are integral with the bolts131. In case, for any reason the bonding of the rubber member38 with'thecups 39 atany time fails, the safety hooks 36 will prevent therspring Iil from completely disassembling the TremoRid.

Figure 19 shows a modification oi' the'Figure 17 construction. infwhichthe bolt 40'is.welded. riveted or otherwise properly securedto the cup-Q 4| and the rubber member 42 is properly bondedto the cups 4| and 43whilethe bolt 44 is properly welded or otherwise secured in the endplate 45; 'I'he spring 46 is properly compressedagainst the cup 4i, 'andthe end plate'145 is put in. place.

andfriveted there by the rivets 41, or attached thereto in anyotherproper manner.

While the constructions shown in Figures 16,

in tension before the TremoRid is installed to carry load, and under theaction of torque all of this is substantially the same as the TremoRidconstruction shown in Figure 5, still the rubber members in Figures 16,17, -19 and 24 do not cushion the shocks on bad road bumps in the sameway as the rubber member 5 inthe. Figure 5 construction, for in theTremoRid shown in the Figure l5 construction the rubber, in fact, per'-i'orms a triple function. `It acts in compression,

f in7tension and in torque the same as the rubber members 'in theFigures 16, 17, 19 and 24 construc` tions, but in addition to this ,therubberfmember `1'1, 19 and 24 all act to put the rubber members in theFigure 5 construction, since it is a closev rit inthe spring I0,provides an additional and positive though resilient stop which is'notprovidedin the construction shownin Figures 16, 17, 19 and 24. y

Rubber, when confined, .is non compressible It is deformabla'but must beable to dow in order to yield: Normally, for the slight amount of cush-`ioning required, the rubber 'member 6 in the Figure -vconstruction mayiiow out to some e compressing movement will be stopped smoothly andresiliently by the increased resistance of the rubber member 5.

The construction shown in Figure 20 is similar to that shown in Figure5, except that a cable 50 or other exible means is pinned, welded,soldered. or otherwise properly attached to the bolts I5, which are inturn welded or otherwise properly fastened to the end cups. 'I'he cableconnection 50, which is normally inactive, servesv to limit theextension of the springor extreme tension which might be put upon therubber for any reason whatsoever, whether it be excessive rebound afterinstallation or in the handling of the TremoRid unit beforeinstallation.

Figure 21 shows another method of construction whereby the unit can beeasily assembled. The process of assembly is similar to that shown inFigure 1-4 and previously explained. In Figure 21 it will be seen thatthe upper plate 53 has been placed upon' the spring iii and forceddownward, compressing the spring i0 so that the tongues 54 of cup 52which at this point project straight upward. pass through the slotsprovided in the end plate 53, whereupon the tongues 54 are bent into theposition as shown in Figures 21 and 22 and serve to contain the TremoRidas a unit. The bottom portion shown in Figure 21 is identical to theconstruction 'shown in Figure 5. However, this may be varied and bothend portions may be made identical to the top as shown in Figure 2l.

Figure 22 is a top view of Figure 2l and serves to show more clearly theposition and the manner in which the tongues 54 are spaced about theplate 52.

Figure 23 shows a construction which in operation and eii'ect is similarto Figure 5, except for the inclusion of a normally inactive safetyrebound means. In this construction the bolt 55 is free to move in thecup 55 but which in case the bondings of the rubber member fail has ahead 55' upon it whereby it will seat in the cup 5B and prevent thespring l0 from completely disassemblingthe TremoRid. Under the action offurther compressive forces, the rubber member 5' combined with thespring i0 will stop the movement before the head of the bolt 55 ispermitted to come into contact with the head o! the rivet 51. The cup 55is attached to the plate 5' by the rivets 35 or in any other propermanner.

Figure 24 shows a construction which in operation and eiiect is similarto Figure 16 except for the addition of a normally inactive safetyrebound means, in case the bonding of the rubber member should fail. Itwilll be seen that the cup 50 fits snugly over the spring 21. The topcup 50 is free to move in the bottom cup 6I and in case the bondingfails and the spring 21 attempts to disassemble the TremoRid, theoutwardly projecting ilange 6I will seat itself against the inwardlyprojecting ange 63 and positively limit the extension of the spring andserve to retain the TremoRid as a unit.

The construction shown in Figure 25, while similar in eect to that shownin Figure 5, is

p manner.

tempt to extend beyond normal limits, the flange 58 Will come intocontact with the flange 61 and prevent further extension. Further thecombined action of the rubber member 69 and the spring I0 will stopthe'movement before the upper cup flange 68 is permitted to come intocontact with the lower cup 66 as a result of compressive forces. It willbe noted from Figure 25 that the rubber member 69 has sumcient clearancebetween its outside diameter and the inside diameter of the cup 65 topermit the proper flow of the rubber under compression.

Figures 26 and 27 show cups 80 and 8i respectively to be used in thesame manner as cup I of Figure l. However, the cross section shape hasbeen varied. which might ail'ord several advantages such as greaterstrength, increased lateral resistance and an increased bonding area.Numerous other variations of cross sections are possible either with orwithout perforations therein. In all of these TremoRid constructionsmore or less lateral or torque resistance can be obtained by increasingor decreasing the depth of the wall section of the cups or any otherproper variation that will vary the resistance of the TremoRid tolateral displacement between its two end plates. In fact, the cups maybe so modified as to have no side walls whatever, in which case theywould appear as flat discs, or discs with circular, radial or otherindentations or proper corrugations as the case may be.

In Figure 28 will be seen a method of construction whereby a portion ofthe power plant weight is sustained by the centrally located TremoRid11. The movement of the power plant about the center of oscillation'ismaintained by the two rubber blocks 15. 'I'he rubber blocks 16 alsoresiliently limit longitudinal vmovement of the power plant throughtheir positioning by means of the flanges 18 of the bracket 14 and theflanges 19 of the brackets 15 and the bonding of the rubber blocks tothe above brackets, or to one bracket only. The flanges 18 and 19 may beof any proper construction, as shown, or imbedded centrally in therubber blocks, or any other proper means may be employed whereintheubracket 14 is resiliently maintained longitudinally with rcspect tothe brackets 15.

The above-mentioned method of mounting, While shown as being on a crossmember 13,

, may be employed at any or all locations en the power plant as inFigure 7; that is, it may be used in conjunction with any one or all ofthe constructions shown on the cross members I1. i8, i9, 20 and/or 2l,or lin any other proper 'Ihe construction shown in Figure 28 shows tworubbers and one TremoRid, while the construction shown in Figure 1lshows one rubber and two TremoRids. Naturally, to suit any particularcondition or requirement, any desired number of TremoRids may -be usedin conjunction with any desired number of rubbers to form a singlemounting.

We have employed the word TremoRid".

tive proportions of the various dimensions in any apague i This is ofour own coining and has beenadopted as a name for the unit which isadapted to be interposed between some rigid support or foundation, suchas the frame of an automobile, for example, and theobject supportedthereon, as for example, the power plant ofan automobile.- itsfundamental purpose being to sustain, absorb, and dissipate the tremoror shocks incident to the activating impulses of the power plant whileresiliently' resisting lateral displacement between its two ends.Clearances, dimensions vand relaor allof, these constructions are to besuch as to provide the kind and amplitudeof movement required for anyand all cases.

Having now described ourvinvention, ywhat we claim as new and desire toprotect by Letters Patent is as Iollowsz- I 'Y 1. A weight supportingmounting vfor an engine unit having atendency to oscillatory movementduring operation about' a longitudinal axis, comcompression spring'between said end members members, a rubber member between the cups andand compressed during assembly so as to be in a preloaded condition. f l

3. A mounting unit adapted to support a load and comprising acompression spring compressed during assembly so as to be in a preloadedcondition and a rubber member limiting the extension of the compressionspring, and means carried byv the mounting unit to attach it to the loadand to the support therefor.

4. A mountingunit comprising two oppositely faced'cups havingloppositely extending threaded attached to the cups, end plates securedto the cups and acompression spring compressedbetween the cups duringassembly so as to be in a preloaded condition when assembled tending toseparate said end plates and put tension on said rubber. n' l 5. In amounting unit to-be connected to a power plantl and a frame to providefor movement between the power plant and the frame and to resilientlyoppose either transverse or longitudinal variation in the relativepositions oi its two endsl and composed oi a coiled spring, a rubbermember closely tting within the coiled spring. end members attached tovthe rubber -member to limit the elongation of the spring when said unitis not installed to carry load, said bers as a unit, and `means forfastening said Iunit t0 the load' to besu'pported and tothe structurethereunder.

'1. A mounting unit of the characterfdescribedcomprising two weight.,supporting resilient members, one or which isnormally in', tension andv5 the other is positively loaded whenxtheunitis not installed toearryload, one o! said'resilientl members surrounding the other,'nand-Limeanstor and havingyopposite endsl of ftl'ie springmbearingfthereagainst, the separate end plates permitting assemblyof` the springafter attachment otjthe rubber member tothe cups.

9. Afpower plant mounting unit comprising a coiled compression spring, anon-metallic resilient member Aenclosed within the coiled spring, andend members connected with the spring and Anonmetallic resilient member,said non-metallic resilient member being constructed and arranged 25 tolimit the extension of the compression spring, said spring having thecoils thereoi free from the non-metallic resilient member and normallydisposed relatively /close together under load to move closer togetherupon an increase in load 30 and thereby restrict flow oi thenon-metallic resilient member causing said last-mentioned member tocarry anincreased proportion of the.

load.

10. A power plant mounting unit comprising a coiled compression spring,a rubber member enclosed within the coiled spring, separate end platesrespectively attached to the rubber-mem- 'ber and having the coiledspring'bearing thereagainst, said rubber member being constructed andarranged to limit the extension of the compression spring, said springhaving the coils there- `of free from the rubber member and normallydisposed relatively close together under ioad to move closer togetherupon an increase in load and thereby restrict ilow of the rubber membercausing said rubber member to carry an increasing proportion of theload, and means connected with the end plates for attaching the mountingunit to a load and to a support therefor.

11.l A power plant mounting unit comprising telescoped resilientmembers, at least one of which is non-metallic, a plate at an end of thenonmetallic lresilient member and bonded thereto, attaching means for anend of the unit and coniningfthe other resilient member, means forsecuring said attaching means to the plate after bonding of thenon-metallic resilient member thereto, and means at the ,opposite end ofsaid unit for conning said resilient members.

l2. A power plant mounting comprising telescoped resilient members, atleast one of which is non-metallic. plates at the opposite ends of thenon-metallic resilient member and bonded thereto, attaching means for anend of the unit having means for conning the other resilient member,means for securing said attaching means to the adjacent plate afterbonding of the nonmetallic resilient member thereto, and means at the'opposite end or said una for winning said 7o resilientmembers.

13. A power plant mounting comprising two telescopedresilientmembers,-one being non-metallic and the other being metallic, plates atthe n opposite ends of the non-metallic resilient mem- 25 'ery thereofwithin the inner contines of the meber and bonded thereto, attachingmeans for an end of the unit having means other than the plates forconfining the metallic resilient member. means for securing saidattaching. means to the adjacent plate after bonding of the nonmetallicresilient member thereto. and means at the opposite end of said unit forconilning said resilient members. y

14. A power plant mounting comprising two telescoped resilient members,one being non-me- -tallic and the other being metallic, plates at theopposite ends of the non-metallic resilient member and bonded thereto,and attaching means tor the opposite ends of the unit having means otherthan the plates for confining the metallic resilient member, and meansfor seeming said attaching means to the adjacent plate after bonding ofthe non-metallic resilient member thereto.

15. A power plant mounting comprising two telescoped resilient members,one being non-metallic and the other being metallic, the metallic membersurrounding the non-metallic member, a plate at an end of thenon-metallic member and bonded thereto, lsaid plate having theperiphtallic member. a second plate at said end of the unit extendingoutwardly in position to confine an end ofthe metallic resilient member,means for securing said second plate to the mst-mentioned plate afterbonding of the non-metallic resilient member thereto, and means at theopposite end of said unit for conilning said resilient members.

16. A power plant mounting comprising two telescoped resilient members,one being non-metallic and the other being metallic, the metallic membersurrounding the non-metallic member, cups enclosing the ends oi thenon-metallic member and bonded thereto, said cups having the outermargins thereof approximately at the periphery of the non-metallicmember and surrounded by the metallic member, plate members at the endsof the unit extending `outwardly beyond the cups in position to coninethe ends of the metallic resilient member, and for securing 29 the platemembers to the cups after bonding of the non-metallic resilient memberthereto.

BEN. A. BWENNES.

ROLLAND S. TROTI. 25

